An Efficient Conflict–Resolution Approach to Support Read/Write Operations in a Video Server

1997 ◽  
Vol 07 (03) ◽  
pp. 321-349 ◽  
Author(s):  
Chien-I Lee ◽  
Ye-In Chang ◽  
Wei-Pang Yang
Keyword(s):  
Conflict Resolution ◽  
Performance Analysis ◽  
Optimal Strategy ◽  
Insertion Sequence ◽  
Continuous Media ◽  
Video Server ◽  
Identification Number ◽  
The Cost

In this paper, we propose an efficient conflict-resolution approach based on the multi-disk architecture for the insertion/deletion operations on continuous media that are split up into blocks and placed in various locations on the disk, without reorganizing the whole data. When a new subobject is inserted after subobject i, it will be assigned with an identification number (i + 1) and be inserted into a disk in which the retrieval of the new subobject does not conflict with the retrieval of any other subobject, where a conflict means a pair of two consecutive subobjects that are stored in the same disk have to be retrieved simultaneously. However, a new conflict on the same disk may occur since all the identification numbers of subobjects after subobject i are increased by one. Only when such a new conflict occurs, one movement operation is required, so does the case of a deletion operation. Moreover, to reduce those additional movement cost, a deferring approach is proposed at the cost of an additional buffer. In this approach, n data insertions are deferred and stored in a buffer. Then, the system starts to insert those data after an optimal insertion sequence is determined. Based on this approach, two strategies are proposed: the conflict-resolved-first-deferring strategy (the CRFD strategy) and the conflict-resolved-last-deferring strategy (the CRLD strategy). From our performance analysis, we will prove that the CRLD strategy with an insertion sequence according to the ascending order of identification numbers is an optimal strategy based on the proposed deferring approach.

Design and development of an aircraft type portable drone for surveillance and disaster management

2018 ◽  
Vol 6 (3) ◽  
pp. 147-159 ◽  
Author(s):  
Kazi Mahmud Hasan ◽  
S.H. Shah Newaz ◽  
Md. Shamim Ahsan
Keyword(s):  
Performance Analysis ◽  
Real Time ◽  
Disaster Management ◽  
Ground Control ◽  
Content Type ◽  
Recovery System ◽  
Ground Control Station ◽  
Autonomous Aircraft ◽  
Aircraft Type ◽  
The Cost

Purpose The purpose of this paper is to demonstrate the development of an aircraft-type autonomous portable drone suitable for surveillance and disaster management. The drone is capable of flying at a maximum speed of 76 km/h. This portable drone comprises five distinct parts those are easily installable within several minutes and can be fit in a small portable kit. The drone consists of a ballistic recovery system, allowing the drone landing vertically. The integrated high-definition camera sends real-time video stream of desired area to the ground control station. In addition, the drone is capable of carrying ~1.8 kg of payload. Design/methodology/approach In order to design and develop the portable drone, the authors sub-divided the research activities in six fundamental steps: survey of the current drone technologies, design the system architecture of the drone, simulation and modeling of various modules of the drone, development of various modules of the drone and their performance analysis, integration of various modules of the drone, and real-life performance analysis and finalization. Findings Experimental results: the cruise speed of the drone was in the range between 45 and 62 km/h. The drone was capable of landing vertically using the ballistic recovery system attached with it. On the contrary, the drone can transmit real-time video to the ground control station and, thus, suitable for surveillance. The audio system of the drone can be used for announcement of emergency messages. The drone can carry 1.8 kg of payload and can be used during disaster management. The drone parts are installed within 10 min and fit in a small carrying box. Practical implications The autonomous aircraft-type portable drone has a wide range of applications including surveillance, traffic jam monitoring and disaster management. Social implications The cost of the cost-effective drone is within $700 and creates opportunities for the deployment in the least developed countries. Originality/value The autonomous aircraft-type portable drone along with the ballistic recovery system were designed and developed by the authors using their won technology.

scholarly journals Performance Analysis of Identification Codes

Entropy ◽  
2020 ◽  
Vol 22 (10) ◽  
pp. 1067
Author(s):  
Sencer Derebeyoğlu ◽  
Christian Deppe ◽  
Roberto Ferrara
Keyword(s):  
Performance Analysis ◽  
Computational Cost ◽  
Identification Code ◽  
Code Construction ◽  
Reed Solomon Codes ◽  
Trade Offs ◽  
The One ◽  
The Cost

In this paper, we analyze the construction of identification codes. Identification codes are based on the question: “Is the message I have just received the one I am interested in?”, as opposed to Shannon’s transmission, where the receiver is interested in not only one, but any, message. The advantage of identification is that it allows rates growing double exponentially in the blocklength at the cost of not being able to decode every message, which might be beneficial in certain applications. We focus on a special identification code construction based on two concatenated Reed-Solomon codes and have a closer look at its implementation, analyzing the trade-offs of identification with respect to transmission and the trade-offs introduced by the computational cost of identification codes.

Performance Analysis of Existing 600MW Coal-Fired Power Plant with MEA-Based CO2 Capture

2011 ◽  
Vol 130-134 ◽  
pp. 3807-3811
Author(s):  
Gang Xu ◽  
Shou Cheng Li ◽  
Xing Yuan ◽  
Yong Ping Yang ◽  
Xiao Na Song
Keyword(s):  
Power Plant ◽  
Performance Analysis ◽  
Economic Performance ◽  
Power Plants ◽  
Aspen Plus ◽  
Capture Process ◽  
Operating Data ◽  
Integrated Optimization ◽  
The Cost ◽  
Plant Efficiency

This paper presents the techno-economic performance of 600 MW coal-fired power plant with and without MEA-based CO2 capture process, based on the operating data of an existing power plant. The simulation and analysis are based on ASPEN PLUS, with fully consideration of features of existing coal-fired power plants and the integration of CO2 capture process with steam cycle. The results show that, when adopting CO2 capture process, the plant efficiency will decrease significantly. And the cost for electricity will increase dramatically. Through further system integrated optimization, the efficiency fall from 40.28% to 29.61%, which is still tremendous but obviously better performance than before.

An optimal strategy for a conflict resolution problem

1986 ◽  
Vol 7 (4) ◽  
pp. 329-332 ◽  
Author(s):  
V. Anantharam ◽  
P. Varaiya
Keyword(s):  
Conflict Resolution ◽  
Optimal Strategy ◽  
Resolution Problem

scholarly journals Risk Response Selection in Construction Projects

2018 ◽  
Vol 3 (12) ◽  
pp. 1208 ◽  
Author(s):  
Hafeth I. Naji ◽  
Rouwaida Hussein Ali
Keyword(s):  
Risk Management ◽  
Optimal Strategy ◽  
Construction Projects ◽  
Response Selection ◽  
Search Algorithm ◽  
Gravitational Search Algorithm ◽  
Response Strategy ◽  
Risk Response ◽  
Gravitational Search ◽  
The Cost

Risk and its management  is  important  for the success of the project, the  risk management, which encompassed of planning, identification, analysis, and response has an important phase, which is risk response  and it should not be undermined, as its  success going to  the projects  the capability  to overcome the  uncertainty and  thus an effective  tool in project risk management, risk response used the collective information in the analysis stage and in order  to take decision how to improve the possibility to complete the project within time, cost and performance. This stage work on preparing the response to the main risks and appoint the people who are responsible for each response.  When it's needed risk response may be started in quantitative analysis stage and the repetition may be possible between the analysis and risk response stage. The aim of this research is to provide a methodology to make the plane for unexpected events and control uncertain situations and identify the reason for risk response failure and to respond to risk successfully by using the optimization method to select the best strategy. The methodology of this research divided into four parts, the first part main object is to find the projects whose risk response is failed, the second part includes the reasons for risk response Failure, the third part includes   finding   the most important risks generated from risk response that leads to increasing the cost of construction projects, the fourth part of the management system is selecting the optimal risk response strategy. An optimization model was used to select the optimal strategy to treat the risk by using Serval constraints such as the cost of the project, time of the project, Gravitational Search Algorithm and particle swarm used. The result of the risk response selection shows that The investment (contractor, bank) strategy shows a very good strategy as it saves the cost about 30%, while the Mitigate (pay for advances with interest 0. 1) Strategy show saving the cost 40%   and giving land to contractors show saving the cost 40% finally the BIM strategy show saving the cost 25%. The risk response is an important part and should give a great attention and it must be used sophisticated method to select the optimal strategy, the two techniques both show high efficiency in selecting the strategy but Gravitational Search Algorithm show better performance.

scholarly journals Same-sex sexual behavior and selection for indiscriminate mating

2020 ◽  
Author(s):  
Brian A Lerch ◽  
Maria R Servedio
Keyword(s):  
Sexual Behavior ◽  
Sexual Reproduction ◽  
Optimal Strategy ◽  
Strong Support ◽  
Same Sex ◽  
Evolutionary Origins ◽  
Wide Range ◽  
Selection For ◽  
The Cost ◽  
Time And Energy

The widespread presence of same-sex sexual behavior (SSB) has long been thought to pose an evolutionary conundrum1-3, as participants in SSB suffer the cost of failing to reproduce after expending the time and energy to find a mate. The potential for SSB to occur as part of an optimal strategy has received almost no attention, although indiscriminate sexual behavior may be the ancestral mode of sexual reproduction4. Here, we build a simple model of sexual reproduction and create a theoretical framework for the evolution of indiscriminate sexual behavior. We provide strong support for the hypothesis that SSB is likely maintained by selection for indiscriminate sexual behavior, by showing that indiscriminate mating is the optimal strategy under a wide range of conditions. Further, our model suggests that the conditions that most strongly favor indiscriminate mating were likely present at the origin of sexual behavior. These findings have implications not only for the evolutionary origins of SSB, but also for the evolution of discriminate sexual behavior across the animal kingdom.

Performance Analysis

2011 ◽  
pp. 308-345
Author(s):  
Maria Manuela Cunha ◽  
Goran D. Putnik
Keyword(s):  
Performance Analysis ◽  
Virtual Enterprise ◽  
Solution Space ◽  
Virtual Enterprises ◽  
Organizational Model ◽  
Enterprise Integration ◽  
Time Constants ◽  
Analytical Simulation ◽  
The Cost

Chapter VII discussed how traditional Internet-based technologies could support Agile/Virtual Enterprise integration. Chapter VIII presented the specification of the Market of Resources as an enabler of this organizational model and Chapter IX introduced its development. This chapter discusses the ability of the Market of Resources to cope with the requirements of Agile/Virtual Enterprises and compares its performance with the performance of traditional Internet-based technologies. It starts with the explanation of the cost-and-effort analysis undertaken, based on the cost-and-effort models introduced in Chapters VII and VIII, followed by the parameterization of this models, by identifying its time constants. This chapter presents a comparative study of performance between the traditional Internet-based tools and the Market of Resources, based on the results of an analytical simulation of the cost and effort of the Market of Resources compared with the utilization of traditional tools in the support of A/VE integration. Finally it identifies the solution space where the Market of Resources presents more efficiency in A/VE integration.

Structure Analysis and Optimization for High-Speed Vertical Machining Tool Table

2011 ◽  
Vol 120 ◽  
pp. 197-202
Author(s):  
Fei Zhang ◽  
Dong Qiang Gao ◽  
Zhi Yun Mao ◽  
Jiang Miao Yi ◽  
Huan Lin
Keyword(s):  
Performance Analysis ◽  
High Speed ◽  
Dynamic Performance ◽  
High Speed Machining ◽  
Static Stiffness ◽  
Performance Requirements ◽  
Overall Performance ◽  
The Cost ◽  
Dynamic Performance Analysis ◽  
Ansys Workbench

In order to meet high-speed machining center’s overall performance requirements, there are four different worktable structures established in SolidWorks, and they are carried out static analysis in ANSYS Workbench to calculate their static stiffness, so that find out the best structure. In meeting the worktable stiffness, the best structure is optimized in ANSYS Workbench, then the worktable’s quality reduces 8.43% in the original foundation and the cost also decreases, which is a basis for worktable’s dynamic performance analysis.

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